US5809029A - Apparatus and method for mapping telecommunications signals onto a subscriber bus - Google Patents
Apparatus and method for mapping telecommunications signals onto a subscriber bus Download PDFInfo
- Publication number
- US5809029A US5809029A US08/767,689 US76768996A US5809029A US 5809029 A US5809029 A US 5809029A US 76768996 A US76768996 A US 76768996A US 5809029 A US5809029 A US 5809029A
- Authority
- US
- United States
- Prior art keywords
- time slots
- data stream
- signaling
- mapping
- set forth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000013507 mapping Methods 0.000 title claims description 39
- 238000000034 method Methods 0.000 title claims description 17
- 230000011664 signaling Effects 0.000 claims abstract description 44
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1623—Plesiochronous digital hierarchy [PDH]
- H04J3/1635—Format conversion, e.g. CEPT/US
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1623—Plesiochronous digital hierarchy [PDH]
- H04J3/1641—Hierarchical systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0478—Provisions for broadband connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0028—Local loop
- H04J2203/0039—Topology
- H04J2203/0044—Bus, e.g. DQDB
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0046—User Network Interface
- H04J2203/0048—Network termination, e.g. NT1, NT2, PBX
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1309—Apparatus individually associated with a subscriber line, line circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13098—Mobile subscriber
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13176—Common channel signaling, CCS7
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13216—Code signals, frame structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13292—Time division multiplexing, TDM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13299—Bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13381—Pair-gain system, digital loop carriers
Definitions
- This invention is related in general to the field of telecommunications systems. More particularly, the invention is related to apparatus and method for mapping telecommunications signals onto a subscriber bus.
- Frequency division multiplexing (FDM) and time division multiplexing (TDM) have been devised to multiplex multiple streams of analog and pulse code modulation (PCM) digital signals, respectively, into one.
- FDM Frequency division multiplexing
- TDM time division multiplexing
- PCM pulse code modulation
- the time division multiplexing hierarchy is DS0 through DS4, where a DS0 is a single 0.064 Mbps channel, a DS1 is 24 DS0s multiplexed together, and a DS4 is 4,032 DS0s multiplexed together.
- a similar time division multiplexing scheme is used in international telephone systems based on 32-channel format, where each channel is occupied by a DS0 signal.
- the international digital systems based on International Telecommunication Union CCITT's G.700 Series Recommendations, are commonly called E1 or CEPT-1.
- the E1 signals are based on blocks of 32 channels or time slots, of which time slot 0 and time slot 16 are typically used for control and signaling, respectively.
- an odd data stream carrying a first set of data time slots of an E1 signal and a first set of signaling and control time slots of the E1 signal
- an even data stream carrying a second set of data time slots of the E1 signal and a second set of signaling and control time slots of the E1 signal.
- the odd and even data streams are bit-interleaved and transported on the subscriber bus.
- a method for mapping E1 signals onto a subscriber bus includes the steps of mapping a first set of data channels of the E1 signals onto predetermined time slots of an odd data stream, and mapping a first set of signaling and control channels of the E1 signals onto other predetermined time slots of the odd data stream. Further included are the steps of mapping a second set of data channels of the E1 signals onto predetermined time slots of an even data stream, and mapping a second set of signaling and control channels of the E1 signals onto other predetermined time slots of the even data stream. Then the odd and even data streams are bit-interleaved for transport on the subscriber bus.
- FIG. 1 is a top level block diagram of an exemplary channel bank unit constructed according to the teachings of the present invention
- FIG. 2 is a diagram of an embodiment of a subscriber bus structure according to the teachings of the present invention.
- FIGS. 3A and 3B are exemplary mapping diagrams for the subscriber bus.
- FIGS. 4A and 4B are further exemplary mapping diagrams for the subscriber bus.
- FIGS. 1-4 The preferred embodiment(s) of the present invention is (are) illustrated in FIGS. 1-4, like reference numerals being used to refer to like and corresponding parts of the various drawings.
- Channel bank 10 constructed according to the teachings of the present invention is shown.
- Channel bank 10 is coupled to a digital loop carrier 12 through a data and control message link 14.
- Digital loop carrier 12 is in communications with equipment residing in a central office (not shown), such as a central office terminal (not shown) of the digital loop carrier and a digital cross-connect system (not shown).
- Channel bank 10 is a DS0 to DS1 or DS0 to E1 multiplexing equipment primarily used for analog voice to pulse code modulation (PCM) conversion and multiplexing.
- Channel bank 10 includes a bank control unit (BCU) 20, which may be coupled to more than one channel unit (CU) 22 via a subscriber bus 26.
- BCU bank control unit
- Channel units 22 may operate at DS1 and DS3 rates, as well as international rates such as E1 .
- a plurality of subscriber equipment 30 may be coupled to each channel unit 22.
- the data carried on subscriber bus 26 has the exemplary format shown in FIG. 2.
- Each frame includes 32 time slots or channels, eight of which are reserved or devoted to signaling and control.
- R denotes a reserved slot
- F denotes framing
- SR denotes systems communications service request channel
- DL denotes data link.
- the arrows indicate the signaling time slots for the channels.
- the word structure for each time slot is also shown.
- Subscriber bus 26 is comprised of two bit-interleaved data streams.
- FIGS. 3A and 3B show the data and signaling format for the ODD and EVEN data streams, which may be identical to transport two DS1 signals. Note that "sig” denotes signaling time slots.
- the dual DS1 or T1 mapping scheme is described in copending U.S. Patent Application titled Apparatus and Method for Mapping Telecommunications Signals onto a Subscriber Bus, Ser. No. 08/768,316, filed on Dec. 17, 1996.
- both data streams are need to transport the data and signaling of one E1 signal, since it is comprised of 32 data time slots.
- the exemplary format for transporting the E1 signal by the ODD and EVEN data streams is shown in FIGS. 4A and 4B. It may be seen that the channels are split between the two data streams. In the embodiment shown in FIGS. 4A and 4B, 24 channels are carried on the ODD data stream, and the remaining eight channels are carried on the EVEN data stream. It may be seen that the exact mapping of the E1 channels onto the data streams may differ than shown. Further, it is contemplated that more than two data streams may be multiplexed together to form subscriber bus 26.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
Claims (31)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/767,689 US5809029A (en) | 1996-06-28 | 1996-12-17 | Apparatus and method for mapping telecommunications signals onto a subscriber bus |
EP97931477A EP0908033B1 (en) | 1996-06-28 | 1997-06-27 | Apparatus and method for mapping e1 telecommunications signals onto a subscriber bus |
PCT/US1997/011291 WO1998000941A1 (en) | 1996-06-28 | 1997-06-27 | Apparatus and method for mapping e1 telecommunications signals onto a subscriber bus |
AU35094/97A AU3509497A (en) | 1996-06-28 | 1997-06-27 | Apparatus and method for mapping e1 telecommunications signals onto a subs criber bus |
CN97195953A CN1130864C (en) | 1996-06-28 | 1997-06-27 | Apparatus and method for mapping E1 telecommunications signals onto a subscriber bus |
BR9710040-4A BR9710040A (en) | 1996-06-28 | 1997-06-27 | Apparatus and method for mapping telecommunications signals on a subscriber bus. |
DE69737322T DE69737322T2 (en) | 1996-06-28 | 1997-06-27 | METHOD AND DEVICE FOR IMPLEMENTING E1 TRANSMISSION SIGNALS FOR A PARTICIPANT BUS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2076296P | 1996-06-28 | 1996-06-28 | |
US08/767,689 US5809029A (en) | 1996-06-28 | 1996-12-17 | Apparatus and method for mapping telecommunications signals onto a subscriber bus |
Publications (1)
Publication Number | Publication Date |
---|---|
US5809029A true US5809029A (en) | 1998-09-15 |
Family
ID=26693828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/767,689 Expired - Lifetime US5809029A (en) | 1996-06-28 | 1996-12-17 | Apparatus and method for mapping telecommunications signals onto a subscriber bus |
Country Status (7)
Country | Link |
---|---|
US (1) | US5809029A (en) |
EP (1) | EP0908033B1 (en) |
CN (1) | CN1130864C (en) |
AU (1) | AU3509497A (en) |
BR (1) | BR9710040A (en) |
DE (1) | DE69737322T2 (en) |
WO (1) | WO1998000941A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6621830B1 (en) * | 1999-12-22 | 2003-09-16 | Alcatel Usa Sourcing, L.P. | Variable rate subscriber bus |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002502167A (en) * | 1998-01-27 | 2002-01-22 | アルカテル・ユー・エス・エイ・ソーシング、エル・ピー | Multi-channel subscriber line card |
EP1264446A1 (en) * | 2000-02-25 | 2002-12-11 | Telefonaktiebolaget LM Ericsson (publ) | Flow control between transmitter and receiver entities in a communications system |
DE10200201A1 (en) * | 2002-01-04 | 2003-07-24 | Daimler Chrysler Ag | Cycle-based timed communication system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2061673A (en) * | 1979-09-20 | 1981-05-13 | Int Standard Electric Corp | Transmitter-receiver synchronizer |
GB2151437A (en) * | 1983-12-13 | 1985-07-17 | Plessey Co Plc | Frame aligner for use in telecommunication exchange systems |
US5077735A (en) * | 1988-12-24 | 1991-12-31 | Electronics And Telecommunications Research Institute | Method and an apparatus for mutually converting different signaling systems |
US5557614A (en) * | 1993-12-22 | 1996-09-17 | Vlsi Technology, Inc. | Method and apparatus for framing data in a digital transmission line |
-
1996
- 1996-12-17 US US08/767,689 patent/US5809029A/en not_active Expired - Lifetime
-
1997
- 1997-06-27 BR BR9710040-4A patent/BR9710040A/en not_active Application Discontinuation
- 1997-06-27 EP EP97931477A patent/EP0908033B1/en not_active Expired - Lifetime
- 1997-06-27 AU AU35094/97A patent/AU3509497A/en not_active Abandoned
- 1997-06-27 CN CN97195953A patent/CN1130864C/en not_active Expired - Fee Related
- 1997-06-27 DE DE69737322T patent/DE69737322T2/en not_active Expired - Lifetime
- 1997-06-27 WO PCT/US1997/011291 patent/WO1998000941A1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2061673A (en) * | 1979-09-20 | 1981-05-13 | Int Standard Electric Corp | Transmitter-receiver synchronizer |
GB2151437A (en) * | 1983-12-13 | 1985-07-17 | Plessey Co Plc | Frame aligner for use in telecommunication exchange systems |
US5077735A (en) * | 1988-12-24 | 1991-12-31 | Electronics And Telecommunications Research Institute | Method and an apparatus for mutually converting different signaling systems |
US5557614A (en) * | 1993-12-22 | 1996-09-17 | Vlsi Technology, Inc. | Method and apparatus for framing data in a digital transmission line |
Non-Patent Citations (1)
Title |
---|
PCT Search Report, dated Nov. 3, 1997, for PCT/US97/11291. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6621830B1 (en) * | 1999-12-22 | 2003-09-16 | Alcatel Usa Sourcing, L.P. | Variable rate subscriber bus |
Also Published As
Publication number | Publication date |
---|---|
DE69737322D1 (en) | 2007-03-22 |
EP0908033A1 (en) | 1999-04-14 |
WO1998000941A1 (en) | 1998-01-08 |
CN1130864C (en) | 2003-12-10 |
BR9710040A (en) | 2000-01-11 |
CN1223764A (en) | 1999-07-21 |
DE69737322T2 (en) | 2007-11-08 |
AU3509497A (en) | 1998-01-21 |
EP0908033B1 (en) | 2007-02-07 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: DSC TELECOM L.P., A TEXAS LIMITED PARTNERSHIP, TEX Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DESCHAINE, STEPHEN A.;ENTEZARI, MANOUCHER;KLECKA, RUDOLPH B, III;REEL/FRAME:008350/0123 Effective date: 19961217 |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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AS | Assignment |
Owner name: ALCATEL USA SOURCING, L.P., TEXAS Free format text: CHANGE OF NAME;ASSIGNOR:DSC TELECOM L.P.;REEL/FRAME:009596/0527 Effective date: 19980909 |
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Owner name: CREDIT SUISSE AG, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:ALCATEL-LUCENT USA INC.;REEL/FRAME:030510/0627 Effective date: 20130130 |
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Owner name: ALCATEL-LUCENT USA INC., NEW JERSEY Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE AG;REEL/FRAME:033949/0531 Effective date: 20140819 |